Alert archive / New Jersey / Special Marine Warnings in 2021
Special Marine Warning 4, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this special marine warning at Feb 22, 2021, 2:32 PM EST. It was in force for 118 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Feb 22, 2021, 2:32 PM EST (19:32 UTC)
- Expired
- Feb 22, 2021, 4:30 PM EST
- In force
- 118 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 34.0 mph
The radar
The Dover AFB radar (KDOX), 67 km from the middle of the area, began a volume at 19:35 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Wallops Is Stn, VA (KWAL), launched 12:00Z, 7.5 hours before the alert went out and 84 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1225 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 362 m²/s²
- 0-3 km storm-relative helicity
- 398 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
570
WHUS51 KPHI 221932
SMWPHI
ANZ431-454-455-475-222130-
/O.NEW.KPHI.MA.W.0004.210222T1932Z-210222T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Mount Holly NJ
232 PM EST Mon Feb 22 2021
The National Weather Service in Mount Holly NJ has issued a
* Special Marine Warning for...
Lower Delaware Bay...
Coastal waters from Cape May NJ to Fenwick Island DE out 20 nm...
Outer waters from Cape May NJ to Fenwick Island DE out 20 to 40
nm...
* Until 430 PM EST.
* At 232 PM EST, showers were located along a line extending from
near Overfalls Shoal to 8 nm north of Chincoteague Bay, moving east
at 30 knots.
HAZARD...Wind gusts 34 knots or greater.
SOURCE...Radar.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
* Locations impacted include...
Overfalls Shoal, Five Fathoms Buoy, Fenwick Island, Cape Henlopen,
Rehoboth Beach, Bethany Beach, Delaware Lightship Buoy 44009, Buoy
2ms and Indian River Inlet Bridge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek safe shelter immediately. Mariners can expect gusty winds and
increasing waves.
&&
LAT...LON 3845 7503 3845 7510 3851 7511 3853 7514
3850 7522 3853 7528 3893 7514 3867 7416
3861 7417 3851 7426 3831 7427 3822 7431
TIME...MOT...LOC 1932Z 265DEG 31KT 3887 7505 3814 7535
HAIL...0.00IN
WIND...>34KTS
$$
CMS4 follow-up statements
685
FZUS71 KPHI 222013
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
313 PM EST Mon Feb 22 2021
ANZ431-454-455-475-222130-
/O.CON.KPHI.MA.W.0004.000000T0000Z-210222T2130Z/
313 PM EST Mon Feb 22 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 430 PM EST...
For the following areas...
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm...
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm...
Delaware Bay waters south of East Point NJ to Slaughter Beach DE...
Waters from Cape May NJ to Fenwick Island DE out 20 to 40 nm...
At 312 PM EST, showers were located along a line extending from near
Buoy 4fb to African Queen Wreck, moving east at 40 knots. Strong
wind gusts will occur for up to an hour behind the line of showers.
HAZARD...Wind gusts to 40 knots.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
Locations impacted include...
Overfalls Shoal, Five Fathoms Buoy, Fenwick Island, Cape Henlopen,
Rehoboth Beach, Bethany Beach, Delaware Lightship Buoy 44009, Buoy
2ms and Indian River Inlet Bridge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor immediately as gusty winds and high waves are
expected.
&&
LAT...LON 3845 7503 3845 7510 3851 7511 3853 7514
3850 7522 3853 7528 3893 7514 3867 7416
3861 7417 3851 7426 3831 7427 3822 7431
TIME...MOT...LOC 2012Z 270DEG 38KT 3886 7449 3817 7491
HAIL...0.00IN
WIND...40KTS
$$
CMS048
FZUS71 KPHI 222032
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
332 PM EST Mon Feb 22 2021
ANZ431-222042-
/O.CAN.KPHI.MA.W.0004.000000T0000Z-210222T2130Z/
332 PM EST Mon Feb 22 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Lower Delaware Bay...
The showers have moved out of the warned area and no longer pose a
significant threat to boaters.
LAT...LON 3843 7495 3883 7477 3867 7416 3861 7417
3851 7426 3831 7427 3822 7431
TIME...MOT...LOC 2032Z 265DEG 31KT 3887 7429 3818 7471
$$
ANZ454-455-475-222130-
/O.CON.KPHI.MA.W.0004.000000T0000Z-210222T2130Z/
332 PM EST Mon Feb 22 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 430 PM EST...
For the following areas...
Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm...
Coastal waters from Cape May NJ to Cape Henlopen DE out 20 nm...
Waters from Cape May NJ to Fenwick Island DE out 20 to 40 nm...
At 332 PM EST, showers were located along a line extending from 7 nm
southwest of Deepwater Reef to 6 nm north of Jackspot Reef, moving
east at 30 knots. Strong winds will occur well behind the band of
showers.
HAZARD...Wind gusts to 40 knots.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
Locations impacted include...
Five Fathoms Buoy and Delaware Lightship Buoy 44009.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor immediately as gusty winds and high waves are
expected.
&&
LAT...LON 3843 7495 3883 7477 3867 7416 3861 7417
3851 7426 3831 7427 3822 7431
TIME...MOT...LOC 2032Z 265DEG 31KT 3887 7429 3818 7471
HAIL...0.00IN
WIND...40KTS
$$
CMS577
FZUS71 KPHI 222058
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
358 PM EST Mon Feb 22 2021
ANZ454-455-222108-
/O.CAN.KPHI.MA.W.0004.000000T0000Z-210222T2130Z/
358 PM EST Mon Feb 22 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Coastal waters from Cape May NJ to Fenwick Island DE out 20 nm...
The showers have moved out of the warned area and no longer pose a
significant threat to boaters.
LAT...LON 3835 7471 3876 7449 3867 7416 3861 7417
3851 7426 3831 7427 3822 7431
TIME...MOT...LOC 2058Z 265DEG 31KT 3889 7401 3820 7443
$$
ANZ475-222130-
/O.CON.KPHI.MA.W.0004.000000T0000Z-210222T2130Z/
358 PM EST Mon Feb 22 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 430 PM EST...
For the following areas...
Waters from Cape May NJ to Fenwick Island DE out 20 to 40 nm...
At 358 PM EST, showers were located along a line extending from 10 nm
southeast of Deepwater Reef to near Chicken Bone, moving east at 30
knots. Strong winds will occur well behind the main band of showers.
HAZARD...Wind gusts to 40 knots.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves.
The showers will remain over mainly open waters.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to safe harbor immediately as gusty winds and high waves are
expected.
&&
LAT...LON 3835 7471 3876 7449 3867 7416 3861 7417
3851 7426 3831 7427 3822 7431
TIME...MOT...LOC 2058Z 265DEG 31KT 3889 7401 3820 7443
HAIL...0.00IN
WIND...40KTS
$$
CMS955
FZUS71 KPHI 222127
MWSPHI
Marine Weather Statement
National Weather Service Mount Holly NJ
427 PM EST Mon Feb 22 2021
ANZ475-222137-
/O.EXP.KPHI.MA.W.0004.000000T0000Z-210222T2130Z/
427 PM EST Mon Feb 22 2021
...THE SPECIAL MARINE WARNING WILL EXPIRE AT 430 PM EST...
The affected areas were...
Outer waters from Cape May NJ to Fenwick Island DE out 20 to 40 nm...
The showers have moved out of the area and no longer pose a
significant threat to boaters.
LAT...LON 3835 7471 3876 7449 3867 7416 3861 7417
3851 7426 3831 7427 3822 7431
TIME...MOT...LOC 2127Z 265DEG 31KT 3891 7372 3822 7414
$$
CMSThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 22, 2:22 PM EST | Special Marine Warning | PHI | 113 min |
Nearby
Special Marine Warnings in New Jersey, 2021Every special marine warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.